Home / 20,143.11-27,797.40-12,183.02

Finding the Fourth Proportional to 20,143.11, 27,797.40 and 12,183.02

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Solution

The fourth proportional to 20,143.11, 27,797.40 and 12,183.02 is: 16,812.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.11 : 27,797.40 = 12,183.02 : x
  2. Step 2: Convert to fraction form
    20,143.11/27,797.40 = 12,183.02/x
  3. Step 3: Cross multiply
    20,143.11x = 27,797.40 × 12,183.02
  4. Step 4: Simplify right side
    20,143.11x = 338,656,141.16
  5. Step 5: Solve for x
    x = 338,656,141.16/20,143.11
  6. Step 6: Final answer
    x = 16,812.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.